fix: unhandled workflow error

[SanketD92]

Issue #, if available:
V377389731

Description of changes:
Providing better error messages.

Checklist:

• Have you successfully deployed to an AWS account with your changes?
• Have you written new tests for your core changes, as applicable?
• Have you successfully tested with your changes locally?

AS review ticket id:

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

Merging #852 (1fcc9f9) into develop (839e7f6) will decrease coverage by 0.10%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop     #852      +/-   ##
===========================================
- Coverage    51.21%   51.10%   -0.11%     
===========================================
  Files          287      288       +1     
  Lines        16027    16147     +120     
  Branches      2497     2515      +18     
===========================================
+ Hits          8208     8252      +44     
- Misses        6864     6933      +69     
- Partials       955      962       +7     

Impacted Files	Coverage Δ
lib/workflow/workflow-template-draft-service.js	36.66% <0.00%> (ø)

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